5642729 has 2 divisors, whose sum is σ = 5642730. Its totient is φ = 5642728.

The previous prime is 5642717. The next prime is 5642743. The reversal of 5642729 is 9272465.

5642729 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3168400 + 2474329 = 1780^2 + 1573^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5642729 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a d-powerful number, because it can be written as 5⁸ + 6⁵ + 4⁵ + 2²⁰ + 7³ + 2²² + 9² .

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5642629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2821364 + 2821365.

It is an arithmetic number, because the mean of its divisors is an integer number (2821365).

Almost surely, 2^5642729 is an apocalyptic number.

It is an amenable number.

5642729 is a deficient number, since it is larger than the sum of its proper divisors (1).

5642729 is an equidigital number, since it uses as much as digits as its factorization.

5642729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 35.

The square root of 5642729 is about 2375.4429060704. The cubic root of 5642729 is about 178.0313141895.

The spelling of 5642729 in words is "five million, six hundred forty-two thousand, seven hundred twenty-nine".